Osgood, William F. (William Fogg), 1864-1943, Graustein, William Caspar, 1888-1941, joint author · New York, The Macmillan company · leaf 96
in its plane, isthe replica of the other,in its plane. Conse-quently, the two parab-olas differ only in thescale to which they aredrawn, and are, there-fore, similar. The details of theproof just outlined can be supplied at once by showing thatthe triangles FPM and MFE are similar, respectively,… … Fig EXERCISES 1. Take a sheet of squared paper and mark D along one ofthe vertical rulings near the edge of the paper. Choose Fat a distance of 1 cm. from D. Then the points of the locuson the vertical rulings — or on as many of them as -one desires— can be marked off rapidly with the compasses.…
Geometry, Analytic
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